Australian wine maker Treasury Wine Estates (TWE.ASX) has announced that first-half earnings fell due to a continuing crackdown on corruption in China, which involves official gift giving, Bloomberg reported. Profit before interest and tax fell between US$36 million and US$40 million in the six months ended December 31, from US$63 million a year earlier. Full-year earnings were forecast to be as much as US$218 million but are set to be between US$165 million and US$183 million. Treasury Wines has sought to tailor products to Chinese consumers, who overtook the French to become the biggest drinkers of red wine in the world last year.